Service manual
n
Probable
cause
of
low oil pressure n
(1)
Clearance
on
one
of
the
bearings
is
to
great.
(2)
One
of
the
rocker
arms
is
too
loose.
(3)
Faulty
pressure regulating valve;
pressure
lower
than
normal
(replace
the
oil filter
or
clean
the
valve
on
the
old
one
with
kerosene or diesel fuel.)
16
H.P
.,
24
H.P.
Rocker arm
Rocker arm shaft
Rocker arm
Rocker arm shaft
Oil
pump
pick·up
screen .
Fig.
8.
Lubrication System
• Oil filter
'
..
,
....
-.~
Relief
valve
Relief valve
...--7
(1)
Rf'plilC~
the
nil
filter
<It
0vmy
nthpr
oil
change (f!very 150
hours)
(2)
Undpr
normal
camiltiol1,
it
is
only
necessarv
to
changE'!
the
nil
filter
at the specifipri intervills.
If,
however,
thE'!
engine
is
used
in
EXTREME L Y
dirty
conditions,
the
prpSSIJrp.
requlat
1r11
valV!' and silfptv villve should also be
rf'!lnoved ilIHi cleanp.d
(3)
Whp.Jlf'v!)r
thl'
oil
filter
is
rpplacmJ, rtm
the
enqine
under
flO
IOild
fnr
il
few
fllinlltr~s
lmtil
the
filter
has been
filled
ilnri
then
add
oil
to
milk
...
up
tor
what
is
contained
in
the
fdtp-r.
(6)
-T-·--·.~
:,'
~ffiY
~
.I
~-
\
l'===~~"
-_
011
pump
Oil
pan
.
-l.
pIck-up screen
Jr
t\
ttJ.--Drain
plug
Fig.
9.
Detail
of
Oil
Pump Pick-up
7.
Filter
cover
assy
2.
Cover
3.
Safety valve
assy
I
4.
Safety valve
'.".
___
2
__
,
5.
Plug
6 .
Spring
7.
O-ring
8.
Relief valve
9.
O-ring
70.
Plug
77.
O-ring
72.
Oil
filter
cartridge
assy
73.
Oil
filter
cartridge
Fig.
70.
Oil
Filter
74.
Label
1.
Relief valve
compo
4.
Ball valve
2.
"0"
ring
5.
Valve sheet
3.
Spring
Fig.
17.
Pressure
Regulating Valve